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#![feature(coverage_attribute)]
#![feature(noop_waker)]
//@ edition: 2021
fn main() {
for i in 0..16 {
let future = async {
if i >= 12 {
println!("big");
} else {
println!("small");
}
};
executor::block_on(future);
}
}
mod executor {
use core::future::Future;
use core::pin::pin;
use core::task::{Context, Poll, Waker};
#[coverage(off)]
pub fn block_on<F: Future>(mut future: F) -> F::Output {
let mut future = pin!(future);
let mut context = Context::from_waker(Waker::noop());
loop {
if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
break val;
}
}
}
}
|
